<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8" />
        <title>别踩白块Demo</title>
    </head>
    <link  rel="stylesheet" href="css/index.css"/>
    <body>
        <h2>
            <span>score: </span>
            <span id="score">0</span>
        </h2>
        <div id="main">
                <div id="con"></div>
            </div>
        <div class="btn">
            <button id="start">Start</button>
        </div>        
    </body>
    <script src="js/index.js"></script>
</html>
